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Yes, a cork will often float on the surface of water, depending on the cork's density. But a marble will sink in water because of its weight. It will not float on the surface.
depending what kind of wood it would probably only be driftwood that would float.
Well it depends on what the 'different' items are.
No. A ship going through a lock gets raised or lowered several meters, without any effect on its ability to float.
Water in water sinks/floats depending mostly on salinity and temperature, note that these two items effect the density of water.
Objects which are less dense than water will float. Objects denser than water will float or sink depending on the volume of water that they displace and that will depend on their shape.
Playdoh can float depending on how dense it is. It also depends on what your floating it on. If you float it on water than it has to be less dense than the water, same with other liquids.
saltwater has salt in it, freshwater does not.
A float valve.
There aren't different types of water (unless you count water with different levels of impurities, but in most cases the impurities will have the same effect as the salt, so it is just the purer water that needs more 'added' salt)
no, what determines whether they will float or not is their density
An egg will float in salt water depending on the amount of salt found in the water because this increases the density of the solution. The density of salt water should always be higher than the density of the egg in order for it to float.
There is no difference on how well a toy boat will float in water depending upon the temperature. The ability for an object to float is if it can displace more than its own weight in water, which doesn't depend on the temperature of the water.
Yes, a cork will often float on the surface of water, depending on the cork's density. But a marble will sink in water because of its weight. It will not float on the surface.
depending what kind of wood it would probably only be driftwood that would float.
float (from a different answerer) It depends on what the object is.
float (from a different answerer) It depends on what the object is.